Finding the Fourth Proportional to 42.01, 63.02 and 19.18

Step by Step Solution

1. Step 1: Write the proportion equation
   42.01 : 63.02 = 19.18 : x
2. Step 2: Convert to fraction form
   42.01/63.02 = 19.18/x
3. Step 3: Cross multiply
   42.01x = 63.02 × 19.18
4. Step 4: Simplify right side
   42.01x = 1,208.72
5. Step 5: Solve for x
   x = 1,208.72/42.01
6. Step 6: Final answer
   x = 28.78